Compressor



NQV. 9, 1948. p KOLLSMAN 2,453,375

COMPRESSOR Filed Aug. 28, 1944 Fig.1

I l -l 38 3,9

- INVENTOR. Paul 01m,

Patented Nov. 9, 1948 UNITED STATES PATENT.

OFFICE COMPRESSOR Paul Kollsmanl New York, N. Y.

Appiication August 28, 1944, Serial No. 551,511

10 Claims. I

Th s invention relates to a rotary, liquid piston machine, and more particularly to a rotary compressor using a liquid as a compressing medium. The structural features of the machine herein disclosed, other than the mounting of the external rotor. are described and claimed in my copending application Serial No. 551,509, entitled Compressor, filed August 28, 1944.

One object of the invention lies in an improved mounting for the external rotor of a rotary ma-l chine using a liquid as a compressing medium.

Another obiect of the invention is the provision of a rotary compressor or other machine using a liquid as a compressing medium and having internal and external eccentrically mounted rotors in which the external rotor is so mounted as to permit variation in the amount of eccentricity. Another object of the invention is the provision of a rotary compressor or other machine using a liquid as a compressing medium and having internal and external eccentrically mounted rotors in which the external rotor is resiliently mounted to Vary the eccentricity in accordance with the compressor outlet pressure.

Other objects and features of the invention will it be readily apparent to those skilled in the art from the specification and appended drawing illustrating certain preferred embodiments in which:

end of the stationary structure 4 and a roller bearing 9 in the support 3 is rotatably mounted a drive shaft H carrying an inner rotor l2 having a pair of spaced peripheral annular plates [3 mounted thereof between which extends separator plate I6 dividing the peripheral space between the plate 15 into a large number of indidividual pockets. Each of these pockets has an opening l! in its base communicating in the proper position with the inlet port I8 in the wall Figure 1 is a longitudinal vertical sectional View of the chamber 6 and with the outlet the Wall of the outlet chamber 1.

Exteriorly of the rotor i2 is eccentrically supported the ou er rotor indicated at 2| and comprising spaced annular plates 22 and 23 connected by the cylindrical portion 24. On the plates 22 and 23 are mounted annuli 25 and 23 forming wells 21 and 28 within which liquid escaping from the interior of the compressor adjacent the outlet is trapped and maintained by centrifugal force to be returned to the compressor adjacent the inlet portion thereof. A liquid supply source is indicated at 29. The rotor 2 las shown in Figures 1 and 2 is rotatbly supported in its position eccentric to the axis of shaft H by means of an endless belt or strap 3! which engages theperiphcry of the cyl nder 24 between the external ends of the plates 22 and 23. The belt 3| extends over an idler pulley 32 supported by bearing 33 upon an arm 34 pivoted at 35 to a fixed part. The opposite end of the arm 34 is connected to the operating piston of a pneumatic cylinder 35, the cylinder being connected in one concept of the invention to the compressor outlet 5 l through constant pressure outlet valve 31. a

By mechanically supporting the rotor 21 by the belt 3|, it is possible to mount a relatively large diameter rotor with a relatively small and inexpensive bearing 33, The direct support of this exterior roller about the other elements of the compressor ordinarily results in a complicated and expensive bearing arrangement while'with the suspension herein disclosed a small and economical bearing may be employed.

Another feature of the invention lies' in the automatic regulation of the output. pressure of the compressor. The outlet of the constant pressure outlet valve 3'! results in aconstant 'force tending to raise the rotor 2|. If the outlet pres sure of the compressor should increase, the reaction force on the rotor tending to move it .toward concentricity will be increasedand the rotor will move downwardly fror'n'the positions of Figures 1 and 2 into a less eccentric position. This decrease in eccentricity decreases the travel of the liquid into the compression chambers of the inner rotor and lowers the output pressure. Since the force tending to move the rotor upwardly is constant the reaction. force. thereagainst .will be maintained constant and accordingly there is an automatic regulation of the output pressure.

In the modification of Figure 3 there has been substituted for the belt 3d a pair of spaced rollers 38 and 39 mounted on.a yoke H carried by the port l9 in engagement with the exterior periphery of motor, and means tor adu'usting said support to trated in con inection with a gas compressor, it Will, of course, be obvious that various features thereof are applicable to engines and other forms of liquid piston machinery and, while certain preferred embodiments of the invention have been specifically disclosed, it is understood that the invention is not limited thereto asmanyvari ations will be readily apparent itothoseslsilled in the art and the invention is to be given its broadest possible interpretation within the terms of the following claims:

. What-is elainiedis: :3

1. In a rotary, liquid :piston machine, an exterior rotor having an annular portion for the reception of a compressing liquid, :a compressing "liquid said portion, an interior rotor in said portion mounted on :an axis eccentric to the axis 101" said exterior rotor and having a plurality of open chambers about the periphery thereof; gas inlet and outlet ports for said chambers, :mea-ns for driving said rotors to effect rotation thereof and means ior mechanically supporting said exterior rotor in its eccentric position and having rolling engagement with the exterior periphery of saidrotor. i

2; In a rotary, liquid piston machine, :an exterior rotor having anannujar-portionfor the reoepti'on of a compressing liquid, Iacompressing liquid in said portion, an interior rotor in said portion mounted on an axis eccentric to the axis of said exterior rotor and having a plurality of open chambers :about the periphery thereof, gas

5. In a rotary, liquid piston machine, an eX- terior rotor having an annular portion for the reception of a compressing liquid, a compressing liquid in said portion, an interior rotor in said portion mounted on an axis eccentric to the axis of said exterior rotor and having a plurality of open chambers about the periphery thereof, gas inlet and outlet ports for said chambers, means for driving said rotors to effect rotation thereof, means fioatingly supporting said exterior rotor in its eccentric positionyand means supplying substantially a constant bias to said supporting means whereby a constant pressure for the machine is automatically attained.

- 6. In a gas compressonan exterior rotor having an annular portion for the reception of a compressing liquid, a compressing liquid in said portion, an interior rotor in said portion mounted ona'n axis eccentric to the axis of said exterior rotor and having a plurality of open chambers about the periphery thereof, gas inletand outlet -po'rts for said chambers, means for driving said rotorsto effect rotationthereof, a continuous belt engaging the outer periphery of said exterior rotor, and an idler pulley engaging and supporting said belt whereby the exterior rotor is supported in its eccentric position.

'7. In a rotary, liquid piston machine, an exteriorrotor having an annular portion for the reception of a compressing liquid, a compressing liquid in said portion, an interior rotor in said portion mounted on an axis eccentric to the axis of saidexterior rotor and having a plurality of open achambers about the periphery thereof, gas

inlet "and outlet ports for said chambers; means for driving :said :rotors to 'BSlTEGt rotation thereof, means for mechanically supporting said exterior rotor in its eccentric position and having rolling said vary the eccentricity between the rotors.

3. In a rotary, liquid piston machine, an exite'ri'or rotor having an annular portion for the reception of a compressing liquid, 2. compressing liquid in said portion, :an interior rotor in said portion mounted on an axis eccentric to the axis of said exterior rotor and having a plurality of open chair'nbers about the periphery thereof, gas 'i1'118't.?&1'1d.011t16fi ports for said chambers, means for driving said rotors to effect rotation thereof, means tor mechanically supporting said exterior rotor in its eccentric position and having rolling engagement with the exterior periphery thereof, and means supplying a constant biasing force to said support by which it floating-1y holds said exterior rotor in its eccentric position whereby a constant pressure for the machine is obtained.

4'. In a rotary, liquid piston machine, terior rotor having an annular portion for the revaception of a compressing liquid; a compressing liquid in said portion, an interior rotor in said portion mounted on an axis eccentric to the axis or said exterior rot-or and having a plurality of open chambers about the periphery thereof, gas inlet and outlet ports for said chambers, means for driving said rotors to effect rotation thereof, and means supporting said exterior rotor adjustable to -vary the eccentricity ibetween the rotors.

inlet and outlet ports for said chambers, means tor driving said rotors to efiect rotation thereof, a continuous belt engaging the outer periphery of said exterior rotor, an idler pulley engaging and supporting said belt whereby the exterior rotor is supported in its eccentric position, and meansfor varying the position of said idler roller to vary the eccentricity between the axes of said rotors. I

8. 'In a rotary, liquid piston machine, an exterior rotor having an annular portion for the reception of a compressing liquid, a compressing liquid said portion, an interior rotor in said portion mounted on an axis eccentric to the :axis of said exterior rotor and having a plurality of open chambers about the periphery thereof, gas inlet and ,outlet ports for said chambers, means for driving said rotors to effect rotation thereof, a continuous belt engaging the outer periphery of .saidexterior rotor, an idler pulley engaging and supporting said belt whereby the exterior rotorissupported in its eccentric position, and means ,floatingly supporting said idler roller with a constant bias whereby the eccentricity of the rotor axes. will be automaticall varied to maintain a substantially constant pressure for the machine. U

'9. In a rotary, liquid piston machine, an exter' ior rotor having an annular portion for the reception of a compressing liquid, 9, compressing liquid in said portion, an interior rotor in said portion mounted on an axis eccentric to the axis of said exterior rotor and having a plurality of open chambers, about the periphery thereof, gas inlet and outlet ports 'for said chambers, means for driving said rotors to eifect rotation thereof, and a plurality of rollers engaged by the periph" ery of said exterior rotor to maintain it; in eccentric position.

'10. In a rotary, liquid piston machine, an exterior rotor having an annular portion for the 6 to maintain a substantially constant pressure for the machine.

PAUL KOLLSMAN.

REFERENCES CITED The following references are of record in the file of this patent:

FOREIGN PATENTS 10 Number Country Date 43,462 Netherlands 1928 84,438 Austria 1924 

